West Lake Sammamish Parkway (WLSP) Phase Two · Transportation Commission January 11, 2018 West...
Transcript of West Lake Sammamish Parkway (WLSP) Phase Two · Transportation Commission January 11, 2018 West...
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Transportation CommissionJanuary 11, 2018
West Lake Sammamish Parkway (WLSP)
Phase Two
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Paul Krawczyk – Transportation
Paul Ferrier – HDR
Scott Johnson - HDR
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2005 Council Adoption of Roadway Cross-section◦ Extensive Public outreach 2003-2005
◦ 8- to 10-foot Multi-use Path on the Westside of Parkway
◦ Landscaped Buffer Where Feasible
◦ 4-foot shoulder on Eastside (Lakeside)
◦ Parkway is 5.5-Miles Long (I-90 to NE 24th Street)
Construction in Phases ◦ Phase One was completed in 2013 and
is located between I-90 and SE 34th
Street (Approx. 1-Mile Long)
◦ Phase One Cost ~$10 Million Dollars
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May 1, 2017 Council Meeting◦ Two-Mile Utility Watermain Replacement
project: SE 1900 block and NE 800 Block
◦ Design of Watermain Replacement Began in Jan. 2017 to Meet Issaquah Water District Request to Increase Water Pressure in Watermain
Sept. 5, 2017 Council Meeting◦ Awarded HDR, Inc contract to prepare
5% Plans and Estimates for Combined Watermain/Roadway Project
◦ Contract includes a recommendation for the “Best Fit” location for WLSP Phase Two Project
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Efficiencies in Addressing both Roadway and Utility Needs
Find Synergy between Utilities and Transportation Work
Minimize Impacts to the Public
Keep Utility Dept. Schedule while accelerating Transportation Improvements◦
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Investigate Design Elements ◦ Roadway Pavement Assessment
◦ Geotechnical Site Investigation
◦ Storm Drainage History
◦ Cost Estimates (Budget Constraint-$8 Million)
Create Project Phasing Options ◦ Recommend “Best-Fit” location within
Watermain Replacement Area (SE 1900 Block to NE 800 Block)
◦ Created Two Project Options
North of SE 2nd Street to NE 800 Block
South of SE 5th Street to SE 1900 Block
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“Best Fit” Evaluation Categories ◦ Avoid Sensitive/Critical Areas
◦ Minimize Driveway Impacts
◦ Minimize Retaining Walls (Both Number and Height)
◦ Minimize Work Roadway Subgrade Work
◦ Minimize Pavement Reconstruction
Evaluation of North and South Roadway Segments◦ Score Each Segment In Each of the
Evaluation Categories
◦ Create Project Phasing Recommendation
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North Segment Design Option◦
South Segment Design Option ◦
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North Segment (SE 2nd to NE 800 Block-Confirm?)◦
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Obtain Support and Gain Concurrence with North Segment Design Recommendation◦
Present Design Report with Commission Recommendation to City Council
Newsletter and Presentation to Public